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Earnings Per Share Share Count Information (Details) - shares | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 03, 2019 | Jun. 01, 2019 | Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Basic | [1] | 749,400,000 | 749,400,000 | 749,400,000 | 749,400,000 |  |  |
Dilutive effect of equity compensation plans |  | 600,000 | 0 | 300,000 | 0 |  |  |
Weighted Average Number of Shares Outstanding, Diluted |  | 750,000,000.0 | 749,400,000 | 749,700,000 | 749,400,000 |  |  |
Stock options and restricted stock units excluded from EPS |  | 7,800,000 | 0 | 7,800,000 | 0 |  |  |
Common Stock, Shares, Issued |  | 748,815,000 | 748,815,000 | 748,815,000 | 748,815,000 |  |  | 748,815,000
Corteva [Member] |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  |  |  | 748,815,000 |  |
Shares in which vesting conditions were met |  |  |  |  |  |  | 600,000 |
[1] | Share amounts for the three and six months ended June 30, 2018, were based on 748.8 million shares of Corteva, Inc. common stock distributed to holders of DowDuPont's common stock on June 1, 2019, plus 0.6 million of additional shares in which accelerated vesting conditions have been met.

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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